blackguard vs offender

blackguard

verb
  • To act like a blackguard; to be a scoundrel. 

  • To revile or abuse in scurrilous language. 

noun
  • The lowest servant in a household charged with pots, pans, and other kitchen equipment. 

offender

noun
  • One who gives or causes offense, or does something wrong. 

  • A person who commits an offense against the law, a lawbreaker. 

How often have the words blackguard and offender occurred in a corpus of books? (source: Google Ngram Viewer )